RETRACTED: Homeopathic Treatment as an Add-On Therapy May Improve Quality of Life and Prolong Survival in Patients with Non-Small Cell Lung Cancer: A Prospective, Randomized, Placebo-Controlled, Double-Blind, Three-Arm, Multicenter Study - Michael Frass; Peter Lechleitner; Christa Gründling; Claudia Pirker; Erwin Grasmuk-Siegl; Julian Domayer; Maximilian Hochmair; Katharina Gaertner; Cornelia Duscheck; Ilse Muchitsch; Christine Marosi; Michael Schumacher; et al. (The Oncologist, 2020)